Kinetics of Zr-Catalyzed Cycloalumination of Alkenes and Alkynes in the Dzhemilev Reaction
作者:I. R. Ramazanov、R. N. Kadikova
DOI:10.1134/s0023158420010085
日期:2020.1
AbstractThe kinetics and chemoselectivity of cycloalumination of 1-octene and 4-octyne with Et3Al in the presence of a catalytic amount of Cp2ZrCl2 in hexane at various temperatures and ratios between reactants was studied. It was found that chemoselectivity for the formation of aluminacyclopentanes and aluminacyclopentenes was improved and the reaction time was significantly shortened when the cycloalumination
Cyclomagnesation of Olefins with Ethylmagnesium Bromide in the Presence of Titanium Complexes
作者:U. M. Dzhemilev、V. A. D’yakonov、L. O. Khafizova、A. G. Ibragimov
DOI:10.1007/s11178-005-0169-z
日期:2005.3
Cyclomagnesation of terminal and cyclic olefins and 1,2-dienes with RMgHlg and R2Mg in the presence of dichloro(dicyclopentadienyl)titanium(IV) gives non-Grignard cyclic and acyclic organomagnesium compounds. The reaction direction depends on the structure of unsaturated initial compound. The most probable reaction mechanism is discussed.
Zirconium-catalyzed reaction of terminal alkenes with triethylindium
作者:I. R. Ramazanov、L. K. Dil’mukhametova、U. M. Dzhemilev
DOI:10.1134/s1070428013090017
日期:2013.9
Terminal alkenes (undec-1-ene, oct-1-ene, and allylbenzene) reacted with triethylindium in the presence of a catalytic amount of Cp2ZrCl2 in hexane to give mixtures of three organoindium compounds whose hydrolysis in D2O afforded 2-substituted 1,4-dideuterobutane containing minor amounts of 2-substituted 1- and 4-deuterobutanes.
A zirconium catalysed synthesis of 1,4-dimagnesium reagents.
作者:Dorian P. Lewis、Philippe M. Muller、Richard J. Whitby、Raymond V.H. Jones
DOI:10.1016/s0040-4039(00)93606-2
日期:1991.11
The zirconium catalysed addition of diethylmagnesium to a variety of unactivated alkenes affords either the simple carbometallation product, or, 1,4-dimagnesium reagents depending on the conditions and substrate. The products can be successfully functionalised with a variety of electrophiles.
Joint cycloalumination of ethylene and other unsaturated compounds with EtAlCl2 in the presence of Cp2ZrCl2. Synthesis of aluminacarbocycles
作者:A. G. Ibragimov、L. O. Khafizova、L. I. Khusainova、T. V. Tyumkina、U. M. Dzhemilev
DOI:10.1134/s1070428010040032
日期:2010.4
A procedure has been developed for the selective synthesis of five-membered aluminum-containing heterocycles, 2,3-dialkyl-1-ethylaluminacyclopent-2-enes, 3-alkyl-1-ethylaluminacyclopentanes, 2-alkylidene-1-ethylaluminacyclopentanes, and 3-alkyl-1-ethyl-2-methylidenealuminacyclopentanes, via joint cycloalumination of ethylene and other unsaturated compounds (acetylenes, olefins, and allenes) with EtAlCl2 in the presence of Cp2ZrCl2 as catalyst.